... the unsaturated phosphatidylcholine species from natural sources such as egg or soy bean phosphatidylcholine provide more permeable and less stable bilayers. Either positively or negatively charged lipids will resulted in the liposome's surface charge. The advantage of liposome is that liposome surfaces can be readily modified by attaching polyethylene glycol (PEG) molecules to the bilayer, the circulation time of liposomes in the blood stream is significantly increased. On the ... and consequently ample time for these liposomes to escape from the circulation through leaky endothelium, ...

• Word Count: 650
• Approx Pages: 3
• Grade Level: Graduate